JavaScript melaksanakan kemahiran effect_javascript karusel imej-tutorial js-php.cn

JavaScript melaksanakan kemahiran effect_javascript karusel imej

WBOY

Lepaskan： 2016-05-16 15:19:00

asal

1070 orang telah melayarinya

Contoh dalam artikel ini memperkenalkan kod javascript terperinci untuk mencapai kesan karusel imej, dan berkongsi dengan semua orang untuk rujukan anda Kandungan khusus adalah seperti berikut

Rendering:

Kod khusus:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style type="text/css">
  *{
    margin: 0;
    padding: 0;
  }
   .wrap{
     width: 510px;
     margin: 0 auto;
     overflow: hidden;
      position: relative;
   }
   .caktye{
     width: 9999px;
     overflow: hidden;
     position: relative;
     left: 0;
   }
   .main{
     text-align: center;
      position: absolute;
      bottom: 10px;
      /*border: 1px solid red;*/
      left: 35%;

   }
   .main button{
     width: 25px;
      height: 25px;
      text-align: center;
      line-height: 25px;
      border-radius: 25px;
      display: inline-block;
      border: none;
   }
   .active{
     background-color: yellow;
   }
   .caktye a{
     float: left;
   }
   .caktye img {
      display: block;
      width:510px;
    }
   #prevBtn{
        display: block;
        position: absolute;
        left: 5px;
        bottom: 45%;
      width: 15px;
      height: 15px;
      /*overflow: hidden;*/
      border-left: 5px solid ;
      border-top: 5px solid ;
       border-color: rgba(255,255,255,0.5);
      -webkit-transform: rotate(45deg);
      transform: rotate(-45deg);
   }
   #nextBtn{
      display: block;
      position: absolute;
      right: 5px;
      bottom: 45%;
      width: 15px;
      height: 15px;
      /*overflow: hidden;*/
      border-right: 5px solid;
      border-top: 5px solid;
      -webkit-transform: rotate(45deg);
      transform: rotate(45deg);
      border-color: rgba(255,255,255,0.5);
      /*background-color: rgba(255,255,255,0.8);*/
   }

  </style>
</head>
<body>
 
  <div class="wrap">
   <div class="caktye" id="inner">
    <a href="###"><img src="img/1.jpg"></a>
    <a href="###"><img src="img/2.jpg"></a>
    <a href="###"><img src="img/3.jpg"></a>
    <a href="###"><img src="img/4.jpg"></a>
    <a href="###"><img src="img/5.jpg"></a>
      <a href="###"><img src="img/1.jpg"></a>
   </div>
    <div class="main">
      <button class="active">1</button>
      <button>2</button>
      <button>3</button>
      <button>4</button>
      <button>5</button>
   </div>
   <div>
      <a href="###" id="prevBtn"></a>
      <a href="###" id="nextBtn"></a>

   </div>
  </div>   
  <script type="text/javascript">
   var innerList = document.getElementById("inner");
   var btnList = document.getElementsByTagName("button");
   var perWidth = inner.children[0].offsetWidth;
   var prevBtn = document.getElementById("prevBtn");
   var nextBtn = document.getElementById("nextBtn");
   // var imgList = inner.getElementsByTagName("img");
   
   // var perWidth = imgList[0].offsetWidth;
   var timer = 0;
   var timer1 = 0;
   var index =0;
   var runFlag = true; //设置一个动画是否走完的标志位

   for(var i = 0; i < btnList.length; i++) {
      btnList[i].index = i;
      btnList[i].onclick = function() {
         index = this.index;
         
         tab();
      }
   }
   function tab() {
      var start = inner.offsetLeft;
      var end = - perWidth * index;
      var change = end - start;
      var t = 0;
      var maxT = 30;

      clearInterval(timer1);
      timer1 = setInterval(function() {
         t++;
         if(t >= maxT) {
            clearInterval(timer1);
            // alert("停下来了");
            runFlag = true;
         }
         inner.style.left = change/maxT * t + start + "px";
         if(index == btnList.length && t >= maxT) {
            inner.style.left = 0;
         }
      },30)

      // inner.style.left = - perWidth * index + "px";
      for(var j = 0; j < btnList.length; j++) {
         btnList[j].className = "";
      }
      if(index >= btnList.length) {
         btnList[0].className = "active";
      }else {
         btnList[index].className = "active";
      }
      
   }
    function xunhuan(){
       index++;
   
         if(index>btnList.length){
         index=1;
         }
         // inner.style.left = - perWidth * index + "px";
       tab();
   }

   var timer =setInterval(xunhuan,5000);

   inner.onmouseover =function(){
   clearInterval(timer);
   }
   inner.onmouseout =function(){
    timer = setInterval(xunhuan,5000);
   }

   function next() {
      index++;
      if(index > btnList.length) {
         index = 1;
      }
      tab();
   }
   function prev() {
      index--;
      if(index < 0 ) {
         index = btnList.length - 1;
         inner.style.left = - btnList.length * perWidth + "px";
         console.log(index);
      }
      tab();
   }
   //下一张
   nextBtn.onclick = function() {
      clearInterval(timer);
      if(runFlag) {
         next();
      }
      runFlag = false;
      
   }
   //上一张
   prevBtn.onclick = function() {
      clearInterval(timer);
      if(runFlag) {
         prev();
      }
      runFlag = false;
      
   }
  </script>
</body>
</html>

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Saya harap artikel ini akan membantu semua orang yang mempelajari pengaturcaraan JavaScript.